BlackBerry Unveils The DTEK50, Claims It’s ‘World’s Most Secure Android Smartphone’. BlackBerry has officially announced the keyboardless DTEK50, the second Android offering from the company. Being touted as the world’s most secure Android smartphone, it features a 5.2-inch scratch resistant display, Android 6.0 Marshmallow, a convenience key which you can map to your favorite. DTEK50 is available for $299 Pre-Order. For more on the DTEK50 or to Pre-Order Click Here